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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/modules/file_module_provider.h"
#include <stddef.h>
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_split.h"
#include "base/threading/thread_task_runner_handle.h"
#include "gin/converter.h"
namespace gin {
namespace {
void AttempToLoadModule(const base::WeakPtr<Runner>& runner,
const std::vector<base::FilePath>& search_paths,
const std::string& id) {
if (!runner)
return;
std::vector<std::string> components = base::SplitString(
id, "/", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
base::FilePath path;
for (size_t i = 0; i < components.size(); ++i) {
// TODO(abarth): Technically the path components can be UTF-8. We don't
// handle that case correctly yet.
path = path.AppendASCII(components[i]);
}
path = path.AddExtension(FILE_PATH_LITERAL("js"));
for (size_t i = 0; i < search_paths.size(); ++i) {
std::string source;
if (!ReadFileToString(search_paths[i].Append(path), &source))
continue;
Runner::Scope scope(runner.get());
runner->Run(source, id);
return;
}
LOG(ERROR) << "Failed to load module from disk: " << id;
}
} // namespace
FileModuleProvider::FileModuleProvider(
const std::vector<base::FilePath>& search_paths)
: search_paths_(search_paths) {
}
FileModuleProvider::~FileModuleProvider() {
}
void FileModuleProvider::AttempToLoadModules(
Runner* runner, const std::set<std::string>& ids) {
std::set<std::string> modules = ids;
for (std::set<std::string>::const_iterator it = modules.begin();
it != modules.end(); ++it) {
const std::string& id = *it;
if (attempted_ids_.count(id))
continue;
attempted_ids_.insert(id);
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(AttempToLoadModule, runner->GetWeakPtr(),
search_paths_, id));
}
}
} // namespace gin
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